The USTA's plans for an upgrade of the National Tennis Center do not include a roof over Arthur Ashe Stadium, or on a new Louis Armstrong Stadium. USTA officials say that the gigantic Arthur Ashe Stadium, which was built on a swamp and seats 23,700, cannot physically absorb the weight of a roof. The new Armstrong Stadium, which will seat 15,000, will be able to support a roof, but will not get one until the main stadium does. “The tournament does not function with a single roof being anywhere but the main stadium,” Daniel Zausner, managing director of the tennis center, told the New York Times.